B Rocker Arm Actuator System Stuck On Bank 1
The rocker arm actuator B on bank 1 stays in the activated state when commanded off. Engine cannot return to the alternate lift or cylinder mode.
Affected components
- Rocker arm actuator b b1
- Oil control valve
Common causes
- High likelihood: Mechanical lock pin stuck in activated position
- Medium likelihood: Oil control valve spool stuck open
- Low likelihood: Carbon or debris buildup preventing free movement
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.